TECHNICAL FIELD
[0002] The present invention relates to a die coater and an
inspection device thereof, and more specifically, to a die
coater in which a position of a lip may be precisely measured
to determine whether assembly defects of a die and a shim
occur, and an inspection may be immediately performed when
the die coater is in the state of being mounted on a
production line without providing a separate inspection line,
and an inspection device thereof.
BACKGROUND ART
[0003] In general, types of a secondary battery include a
nickel cadmium battery, a nickel hydrogen battery, a lithium
ion battery, a lithium ion polymer battery, and the like.
Such a secondary battery is applied and used in small
products such as digital cameras, P-DVDs, MP3P, mobile phones,
PDAs, portable game devices, power tools, and e-bikes, as
well as large products that require high power such as
electric vehicles and hybrid vehicles, and power storage
devices for storing surplus generated power or renewable
energy, and power storage devices for backup power.
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[0004] In order to manufacture the above secondary battery,
electrode active material slurry is first applied on a
positive electrode collector and a negative electrode
collector to manufacture a positive electrode and a negative
electrode, and the positive electrode and the negative
electrode are stacked on both sides of a separator to form an
electrode assembly having a predetermined shape. Then, the
electrode assembly is accommodated in a battery case,
followed by injecting an electrolyte thereto, and sealing.
[0005] An electrode such as a positive electrode and a
negative electrode may be manufactured by applying slurry
prepared by mixing an electrode active material, a binder,
and a plasticizer with an electrode collector on an electrode
collector such as a positive electrode collector and a
negative electrode collector, and then drying and pressing
the same. In order to apply such slurry on an electrode
collector, a die coater is used.
[0006] A die coater generally includes a first die, a shim,
and a second die, may be formed by assembling the first die
and the second die with the shim interposed between the first
die and the second die. At this time, a third die may be
further provided between the first die and the second die, in
which case a first shim may be interposed between the first
die and the third die and a second shim may be interposed
between the second die and the third die. That is, a die
coater may include dies and shims in various numbers.
[0007] The die coater has a very narrow gap between
discharge ports through which the slurry and the like are
discharged. However, when such a gap differs from a designed
gap due to an assembly tolerance or the like, the amount of
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slurry applied on an electrode collector and the like will
greatly differ from a designed value. In that case, the
quality of a manufactured electrode may be different from
designed quality.
[0008] Alternatively, if a die coater is used for a long
time once it is assembled, a die and a shim may be dissembled
and then reassembled for internal cleaning or the like.
However, in such a process, the positions of a first lip of
the first die, a guide of the shim, a second lip of the
second die may be deviated from their original positions.
Then, even when the same die coater is used to manufacture an
electrode, the quality of the electrode before and after the
reassembly may be different.
[0009] Therefore, in order to reduce an assembly tolerance
and the like, a user allows a lip of a die coater to be
indirect contact with a micrometer so as to measure the
height of a first lip, a shim, and a second lip and gaps
therebetween. However, since the gap of a discharge port
between such lips is very narrow, it is not easy for the user
to make a direct contact therewith to perform measurement,
and there is also a problem of increasing in errors due to
different measurement results by each user.
DISCLOSURE OF THE INVENTION
TECHNICAL PROBLEM
[0010] An object to be achieved by the present invention is
to provide a die coater in which a position of a lip may be
precisely measured to determine whether an assembly of a die
and a shim is defective and an inspection may be immediately
performed when the die coater is in the state of being
mounted on a production line without providing a separate
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inspection line, and an inspection device thereof.
[0011] The objects of the present invention are not limited
to the aforementioned object, but other objects not described
herein will be clearly understood by those skilled in the art
from descriptions below.
TECHNICAL SOLUTION
[0012] A device for inspecting a die coater including a
first die, a second die, and a shim formed between the first
die and the second die according to an embodiment of the
present invention for solving the above problems includes a
rail formed to be fixed long on one surface of the first die
in a longitudinal direction of the die coater, and at least
one sensor assembly configured to move along the rail and
inspect a lip or the shim of the die coater, wherein the
sensor assembly includes a movable part moving along the rail
in the longitudinal direction of the die coater, and a sensor
module connected to the movable part, and configured to move
in a thickness direction of the die coater and inspect the
lip or the shim.
[0013] In addition, the sensor module may include a position
detection sensor configured to detect the position of the lip,
and a distance detection sensor configured to measure the
height of the lip or the shim.
[0014] In addition, the position detection sensor and the
distance detection sensor may be disposed in parallel to each
other in the longitudinal direction of the die coater.
[0015] In addition, the position detection sensor may
include at least one of a fiber optic sensor, a photo sensor,
a proximity sensor, or a vision sensor, and the distance
detection sensor may include at least one of a laser
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displacement sensor or an ultrasonic displacement sensor.
[0016] In addition, the shim may include at least one guide
configured to divide an internal space between the first die
and the second die into a plurality of spaces, and a base
connecting ends of the guide to each other and extending in a
longitudinal direction of the die coater.
[0017] In addition, the position detection sensor may move
along a first path in which the guide is not present, and the
distance detection sensor may move along a second path in
which the guide is present.
[0018] In addition, the sensor module may move in a
direction from the first die to the second die.
[0019] In addition, a control part configured to control the
operation of the sensor assembly, and a storage part in which
reference data on the thickness of the lip or the shim is
stored may be further included.
[0020] In addition, the control part may include a first
encoder configured to recognize a coordinate value of the
sensor module whenever the sensor module moves in the
thickness direction of the die coater, a reception part
configured to receive a signal transmitted by the position
detection sensor, a determination part configured to
determine the position of the lip or the shim according to
the signal received by the reception part, and a calculation
part configured to perform calculation based on the position
of the lip or the shim and the coordinate value to derive a
coordinate value of the lip or a coordinate value of the shim.
[0021] In addition, the position detection sensor may change
a signal transmitted to the reception part from a first
signal to a second signal, when detecting an edge of the lip.
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[0022] In addition, the first encoder may recognize the
coordinate value of the sensor module as a coordinate value
of the edge, when the first signal is changed to the second
signal.
[0023] In addition, the storage part may store the
coordinate value of the edge recognized by the first encoder.
[0024] In addition, the determination part may determine the
position of the lip or the shim using the edge as a boundary,
when the reception part receives the second signal.
[0025] In addition, the calculation part may load the
reference data on the thickness of the lip or the shim from
the storage part and calculate reference data on the
coordinate value of the edge and the thickness of the lip or
the shim by reflecting the position of the lip or the shim to
derive the coordinate value of the lip or the shim.
[0026] In addition, the calculation part may calculate half
of the thickness of the lip or the shim to the coordinate
value of the edge to derive the coordinate value of the lip
or the shim.
[0027] In addition, the storage part may store the derived
coordinate value of the lip or the shim.
[0028] In addition, the sensor module may move to a position
corresponding to the derived coordinate value of the lip or
the shim.
[0029] In addition, the distance detection sensor may
measure the height of the lip or the shim at the position
corresponding to the coordinate value of the lip or the shim.
[0030] In addition, the storage part may store measurement
data on the height of the lip or the shim.
[0031] In addition, the storage part may have reference data
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on the height of the lip or the shim stored therein.
[0032] In addition, the determination part may compare the
measurement data on the height of the lip or the shim with
the reference data on the height of the lip or the shim to
determine whether defects occur.
[0033] In addition, the control part may further include a
second encoder configured to recognize a coordinate value of
the movable part whenever the movable part moves along the
rail in the longitudinal direction of may be coater.
[0034] In addition, the rail may be formed to be coupled to
one surface of the first die.
[0035] In addition, the rail may be integrally formed on one
surface of the first die.
[0036] In addition, the rail may be formed to be embedded on
one surface of the first die.
[0037] In addition, the sensor assembly may be provided in
plurality.
[0038] In addition, a height of the sensor module may be
less than a gap between the lip and a base material to be
coated.
[0039] In addition, the movable part may include a rod
configured to move the sensor assembly in a width direction
of the die coater.
[0040] In addition, the movable part may include a rotatable
part configured to rotate around an axis parallel to the
longitudinal direction of the die coater.
[0041] In addition, the movable part may be detachable from
the rail.
[0042] In addition, the sensor module may include a 2D line
sensor configured to scan the die coater so as to two-
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dimensionally detect the shape of the lip and the shim in the
width direction of the die coater, and an inspection part
configured to compare a measured height value from an edge of
the lip to an edge of the shim detected through the 2D line
sensor with a set height value to inspect whether defects
occur.
[0043] In addition, the inspection part may inspect the
arrangement state of two or more dies using the shape of the
lip and the shim detected through the 2D line sensor.
[0044] In addition, the inspection part may inspect whether
the edge of the lip detected by the 2D line sensor is
positioned on the same horizontal line.
[0045] In addition, the inspection part may measure the
thickness of the shim using the edge of the lip and the edge
of the shim detected through the 2D line sensor, and inspect
a discharge gap through the thickness of the shim.
[0046] In addition, the 2D line sensor may scan the die
coater every set time to continuously detect the shape of the
edge of the lip and the shape of the edge of the shim, and
the inspection part may inspect a degree of wear of the die
and the shim by a change in position with respect to the edge
of the lip or a change in position with respect to the edge
of the shim continuously measured through the 2D line sensor.
[0047] In addition, the inspection part may be configured to
inspect surface roughness by enlarging the shapes of the lip
and the shim detected through the 2D line sensor.
[0048] A die coater according to an embodiment of the
present invention for solving the above problem includes a
first die and a second die configured to supply slurry to the
outside, and a shim formed between the first die and the
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second die, wherein a rail is formed to be fixed long on one
surface of the first die in a longitudinal direction.
[0049] In addition, the die coater may further include at
least one sensor assembly configured to move along the rail
and inspect a lip or the shim, and a control part configured
to control the operation of the sensor assembly, wherein the
sensor assembly may include a movable part moving along the
rail in a longitudinal direction, and a sensor module
connected to the movable part, and configured to move in a
thickness direction, and configured to inspect the lip.
[0050] In addition, the sensor module may include a position
detection sensor configured to detect the position of the lip,
and a distance detection sensor configured to measure the
height of the lip or the shim.
[0051] Other specific details of the present invention are
included in the detailed description and drawings.
ADVANTAGEOUS EFFECTS
[0052] According to the embodiments of the present invention,
there are at least the following effects.
[0053] Since the die coater inspection device is formed on
one surface of a first die of the die coater, there is no
need for a user to perform measurement or separate setting,
so that it is easy to measure the height, gap, and the like
of a lip, and it is possible to reduce errors, thereby
accurately determining whether an assembly of a die and a
shim is defective.
[0054] In addition, it is possible to immediately inspect
the die coater when the die coater is in the state of being
mounted on a production line without moving the die coater to
a separate inspection line, so that it is possible to reduce
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an inspection time and increase in production efficiency.
[0055] In addition, a die coater inspection device may
automatically detect the position and height of the lip and
the shim, the inspection may be easily performed, and the
problem of increasing in errors due to the different
measurement results by each user may be prevented.
[0056] The effects according to the present invention are
not limited by the contents exemplified above, and more
various effects are included herein.
BRIEF DESCRIPTION OF THE DRAWINGS
[0057] FIG. 1 is a perspective view of a die coater 2 and a
die coater inspection device 1 according to an embodiment of
the present invention.
[0058] FIG. 2 is an assembly view of the die coater 2
according to an embodiment of the present invention.
[0059] FIG. 3 is a flowchart of a die coater inspection
method according to an embodiment of the present invention.
[0060] FIG. 4 is an enlarged side view of a lip 22 of the
die coater 2 according to an embodiment of the present
invention.
[0061] FIG. 5 is a block diagram of the die coater
inspection device 1 according to an embodiment of the present
invention.
[0062] FIG. 6 is an enlarged top view of the lip 22 of the
die coater 2 according to an embodiment of the present
invention.
[0063] FIG. 7 is a perspective view of a die coater 2a and a
die coater inspection device 1a according to another
embodiment of the present invention.
[0064] FIG. 8 is a perspective view of a die coater 2b and
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the die coater inspection device 1 according to further
another embodiment of the present invention.
[0065] FIG. 9 is a perspective view of the die coater 2 and
a die coater inspection device 1c according to further
another embodiment of the present invention.
[0066] FIG. 10 is a perspective view of the die coater 2 and
a die coater inspection device 1d according to further
another embodiment of the present invention.
[0067] FIG. 11 is a perspective view of the die coater 2 and
a die coater inspection device 1e according to further
another embodiment of the present invention.
[0068] FIG. 12 is a perspective view of the die coater 2 and
a die coater inspection device 1f according to further
another embodiment of the present invention.
[0069] FIG. 13 is an enlarged side view illustrating the die
coater 2 of FIG. 12.
[0070] FIG. 14 is a view illustrating a two-dimensionally
scanned image of a die coater.
MODE FOR CARRYING OUT THE INVENTION
[0071] Advantages and features of the present invention, and
implementation methods thereof will be clarified through
following embodiments described with reference to the
accompanying drawings. The present invention may, however,
be embodied in different forms and should not be construed as
limited to the embodiments set forth herein. Rather, these
embodiments are provided so that this disclosure will be
thorough and complete, and will fully convey the scope of the
present invention to those skilled in the art. Further, the
present invention is only defined by scopes of claims. Like
reference numerals refer to like elements throughout.
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[0072] Unless otherwise defined, all the terms used herein
(including technical and scientific terms) will be used in a
sense that can be commonly understood to those of ordinary
skill in the art to which the inventive concept pertains. In
addition, the terms that are defined in a commonly used
dictionary are not interpreted ideally or excessively unless
specifically defined.
[0073] The terms used herein are for the purpose of
describing embodiments and are not intended to be limiting of
the present invention. In the present disclosure, singular
forms include plural forms unless the context clearly
indicates otherwise. As used herein, the terms “comprises”
and/or “comprising” are intended to be inclusive of the
stated elements, and do not exclude the possibility of the
presence or the addition of one or more other elements.
[0074] Hereinafter, preferred embodiments of the present
invention will be described in detail with reference to the
accompanying drawings.
[0075] FIG. 1 is a perspective view of a die coater 2 and a
die coater inspection device 1 according to an embodiment of
the present invention.
[0076] According to an embodiment of the present invention,
the die coater inspection device 1 is formed on one surface
of a first die 211 of the die coater 2, so that there is no
need to allow a user to directly perform measurement or
separate setting, it is easy to measure a height, a gap, and
the like of a lip 22 (illustrated in FIG. 4), and it is
possible to reduce errors, thereby accurately determining
whether an assembly of a die 21 and a shim 23 (illustrated in
FIG. 2) is defective. In addition, it is possible to
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immediately inspect the die coater 2 when the die coater 2 is
in the state of being mounted on a production line without
moving the die coater 2 to a separate inspection line, so
that it is possible to reduce an inspection time and increase
in production efficiency. In addition, the die coater
inspection device 1 may automatically detect the positions
and heights of the lip 22 and the shim 23, so that the
inspection may be easily performed, and a problem of
increasing in errors due to different measurement results by
each user may be prevented.
[0077] To this end, in the device for inspecting the die
coater 2 including the first die 211 (illustrated in FIG. 2),
the second die 212 (illustrated in FIG. 2), and the shim 23
formed between the first die 211 and the second die 212, the
die coater inspection device 1 according to an embodiment of
the present invention includes a rail 11 formed to be fixed
long on one surface of the first die 211 in a longitudinal
direction of the die coater 2, and at least one sensor
assembly 12 moving along the rail 11 and inspecting the lip
22 or the shim 23 of the die coater 2. Here, the sensor
assembly 12 includes a movable part 121 moving along the rail
11 in the longitudinal direction of the die coater 2, and a
sensor module 122 connected to the movable part 121, moving
in a thickness direction of the die coater 2, and inspecting
the lip 22 or the shim 23 of the die 21.
[0078] In addition, the die coater 2 according to an
embodiment of the present invention includes the first die
211 and the second die 212 which supply slurry to the outside,
and the shim 23 formed between the first die 211 and the
second die 212. Here, the rail 11 is formed to be fixed long
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on one surface of the first die 211 in the longitudinal
direction. In addition, at least one sensor assembly 12
moving along the rail 11 and inspecting the lip 22 or the
shim 23, and a control part 13 configured to control an
operation of the sensor assembly 12 are further included.
Here, the sensor assembly 12 may include the movable part 121
moving along the rail 11 in the longitudinal direction, and
the sensor module 122 connected to the movable part 121,
moving in a thickness direction, and inspecting the lip 22.
[0079] The rail 11 is formed long in the longitudinal
direction of the die coater 2. In addition, the movable part
121 of the sensor assembly 12 moves along the rail 11. The
rail 11 is formed to be fixed on one surface of the first die
211, so that the die coater 2 and the rail 11 may not be
easily separated or easily dislocated from each other.
Therefore, there is no need to allow the user to directly
measure the lip 22 of the die coater 2, or separate setting a
sensor, so that the sensor assembly 12 may easily inspect the
lip 22 or the shim 23 formed at a side of a discharge port of
the die coater 2. In addition, since measurement results by
each user are not different, the errors are reduced, and thus,
it is possible to accurately determine whether the assembly
of the die 21 and the shim 23 is defective. According to an
embodiment of the present invention, the rail 11 may be
formed to be coupled to one surface of the first die 211
through a separate coupling part (not shown) such as a bolt
or a rivet, but is not limited thereto, and may be coupled to
one surface of the first die 211 by various methods.
[0080] The sensor assembly 12 includes the movable part 121
moving along the rail 11 in the longitudinal direction of the
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die coater 2, and the sensor module 122 connected to the
movable part 121 and inspecting the lip 22 or the shim 23 of
the die 21.
[0081] The movable part 121 moves along the rail 11 in the
longitudinal direction of the die coater 2, and particularly,
the movable part 121 may slide and move along the rail 11.
To this end, the rail 11 and the movable part 121 may be
slidably coupled to each other, and furthermore, at least one
of the rail 11 and the movable part 121 may have a wheel or a
roller.
CLAIMS
1. A die coater inspection device for inspecting a
die coater comprising a first die, a second die, and a shim
formed between the first die and the second die, the die
coater inspection device comprising:
a rail formed to be fixed long on one surface of the
first die in a longitudinal direction of the die coater; and
at least one sensor assembly configured to move along
the rail and inspect a lip or the shim of the die coater,
wherein the sensor assembly comprises:
a movable part moving along the rail in the
longitudinal direction of the die coater; and
a sensor module connected to the movable part,
and configured to move in a thickness direction of the die
coater and inspect the lip or the shim.
2. The die coater inspection device of claim 1,
wherein the sensor module comprises:
a position detection sensor configured to detect a
position of the lip; and
a distance detection sensor configured to measure a
height of the lip or the shim.
3. The die coater inspection device of claim 2,
wherein the position detection sensor and the distance
detection sensor are disposed in parallel to each other in
the longitudinal direction of the die coater.
4. The die coater inspection device of claim 2,
48
wherein the position detection sensor comprises at least one
of a fiber optic sensor, a photo sensor, a proximity sensor,
or a vision sensor; and
the distance detection sensor comprises at least one of
a laser displacement sensor or an ultrasonic displacement
sensor.
5. The die coater inspection device of claim 2,
wherein the shim comprises:
at least one guide configured to divide an internal
space between the first die and the second die into a
plurality of spaces; and
a base configured to connect ends of the guide to each
other and extending in a longitudinal direction of the die
coater.
6. The die coater inspection device of claim 5,
wherein the position detection sensor moves along a first
path in which the guide is not present; and
the distance detection sensor moves along a second path
in which the guide is present.
7. The die coater inspection device of claim 2,
wherein the sensor module moves in a direction from the first
die to the second die.
8. The die coater inspection device of claim 2,
further comprising:
a control part configured to control an operation of
the sensor assembly; and
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a storage part in which reference data on the thickness
of the lip or the shim is stored.
9. The die coater inspection device of claim 8,
wherein the control part comprises:
a first encoder configured to recognize a coordinate
value of the sensor module whenever the sensor module moves
in the thickness direction of the die coater;
a reception part configured to receive a signal
transmitted by the position detection sensor;
a determination part configured to determine the
position of the lip or the shim according to the signal
received by the reception part; and
a calculation part configured to perform calculation
based on the position of the lip or the shim and the
coordinate value so as to derive a coordinate value of the
lip or a coordinate value of the shim.
10. The die coater inspection device of claim 9,
wherein, when detecting an edge of the lip, the position
detection sensor changes a signal transmitted to the
reception part from a first signal to a second signal.
11. The die coater inspection device of claim 10,
wherein, when the first signal is changed to the second
signal, the first encoder recognizes the coordinate value of
the sensor module as a coordinate value of the edge.
12. The die coater inspection device of claim 11,
wherein the storage part stores the coordinate value of the
50
edge recognized by the first encoder.
13. The die coater inspection device of claim 11,
wherein, when the reception part receives the second signal,
the determination part determines the position of the lip or
the shim using the edge as a boundary.
14. The die coater inspection device of claim 11,
wherein the calculation part loads the reference data on the
thickness of the lip or the shim from the storage part and
calculates reference data on the coordinate value of the edge
and the thickness of the lip or the shim by reflecting the
position of the lip or the shim to derive the coordinate
value of the lip or the shim.
15. The die coater inspection device of claim 14,
wherein the calculation part calculates half of the thickness
of the lip or the shim to the coordinate value of the edge to
derive the coordinate value of the lip or the shim.
16. The die coater inspection device of claim 14,
wherein the storage part stores the derived coordinate value
of the lip or the shim.
17. The die coater inspection device of claim 14,
wherein the sensor module moves to a position corresponding
to the derived coordinate value of the lip or the shim.
18. The die coater inspection device of claim 17,
wherein the distance detection sensor measures the height of
51
the lip or the shim at the position corresponding to the
coordinate value of the lip or the shim.
19. The die coater inspection device of claim 18,
wherein the storage part stores measurement data on the
height of the lip or the shim.
20. The die coater inspection device of claim 18,
wherein the storage part has reference data on the height of
the lip or the shim stored therein.
21. The die coater inspection device of claim 20,
wherein the determination part compares the measurement data
on the height of the lip or the shim with the reference data
on the height of the lip or the shim to determine whether
defects occur.
22. The die coater inspection device of claim 9,
wherein the control part further comprises a second encoder
configured to recognize a coordinate value of the movable
part whenever the movable part moves along the rail in the
longitudinal direction of the die coater.
23. The die coater inspection device of claim 1,
wherein the rail is formed to be coupled to one surface of
the first die.
24. The die coater inspection device of claim 1,
wherein the rail is integrally formed on one surface of the
first die.
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25. The die coater inspection device of claim 1,
wherein the rail is formed to be embedded in one surface of
the first die.
26. The die coater inspection device of claim 1,
wherein the sensor assembly is provided in plurality.
27. The die coater inspection device of claim 1,
wherein a height of the sensor module is less than a gap
between the lip and a base material to be coated.
28. The die coater inspection device of claim 1,
wherein the movable part comprises a rod configured to move
the sensor assembly in a width direction of the die coater.
29. The die coater inspection device of claim 1,
wherein the movable part comprises a rotatable part
configured to rotate around an axis parallel to the
longitudinal direction of the die coater.
30. The die coater inspection device of claim 1,
wherein the movable part is detachable from the rail.
31. The die coater inspection device of claim 1,
wherein the sensor module comprises:
a 2D line sensor configured to scan the die coater so
as to two-dimensionally detect the shape of the lip and the
shim in the width direction of the die coater; and
an inspection part configured to compare a measured
53
height value from an edge of the lip to an edge of the shim
detected through the 2D line sensor with a set height value
to inspect whether defects occur.
32. The die coater inspection device of claim 31,
wherein the inspection part is configured to inspect the
arrangement state of two or more dies using the shape of the
lip and the shim detected through the 2D line sensor.
33. The die coater inspection device of claim 31,
wherein the inspection part is configured to inspect whether
the edge of the lip detected through the 2D line sensor is
positioned on the same horizontal line.
34. The die coater inspection device of claim 31,
wherein the inspection part is configured to measure the
thickness of the shim using the edge of the lip and the edge
of the shim detected through the 2D line sensor, and inspect
a discharge gap through the thickness of the shim.
35. The die coater inspection device of claim 31,
wherein the 2D line sensor is configured to scan the die
coater every set time so as to continuously detect the shape
of the edge of the lip and the shape of the edge of the shim;
and
the inspection part is configured to inspect a degree
of wear of the die and the shim by a change in position with
respect to the edge of the lip or a change in position with
respect to the edge of the shim continuously measured through
the 2D line sensor.
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36. The die coater inspection device of claim 31,
wherein the inspection part is configured to inspect surface
roughness by enlarging the shapes of the lip and the shim
detected through the 2D line sensor.
37. A die coater comprising:
a first die and a second die configured to supply
slurry to the outside; and
a shim formed between the first die and the second die,
wherein a rail is formed to be fixed long on one surface of
the first die in a longitudinal direction.
38. The die coater of claim 37, further comprising:
at least one sensor assembly configured to move along
the rail and inspect a lip or the shim; and
a control part configured to control the operation of
the sensor assembly,
wherein the sensor assembly comprises:
a movable part moving along the rail in a
longitudinal direction; and
a sensor module connected to the movable part,
configured to move in a thickness direction, and configured to inspect the lip.
39. The die coater of claim 38, wherein the sensor
module comprises:
a position detection sensor configured to detect the position of the lip; and
a distance detection sensor configured to measure the height of the lip or the shim.